package com.sky.service.user.impl;

import cn.hutool.core.bean.BeanUtil;
import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.mapper.common.DishMapper;
import com.sky.mapper.common.SetmealMapper;
import com.sky.mapper.user.ShoppingCartMapper;
import com.sky.pojo.Dish;
import com.sky.pojo.Setmeal;
import com.sky.pojo.ShoppingCart;
import com.sky.service.user.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public void addShoppingCart(ShoppingCartDTO dto) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtil.copyProperties(dto,shoppingCart);

        // 只能查询自己的购物车数据 TODO  获取不到登录用户id  BaseContext.getCurrentId()
        shoppingCart.setUserId(40L);
//        shoppingCart.setUserId(BaseContext.getCurrentId());


        // 判断当前菜品或套餐是否在购物车中
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if (shoppingCartList != null && shoppingCartList.size() == 1){
            // 如果存在，则将购物车数量加一
            shoppingCart = shoppingCartList.get(0);
            shoppingCart.setNumber(shoppingCart.getNumber() + 1);
            shoppingCartMapper.updateNumberById(shoppingCart);
        }else {
            // 如果不存在，则添加到购物车，数量默认就是一

            // 判断当前添加到购物车的是否菜品还是套餐
            Long dishId = dto.getDishId();
            if (dishId != null){
                // 添加到购物车的是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }else {
                // 添加到购物车的是套餐
                Setmeal setmeal = setmealMapper.getById(dto.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }

            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }


    }

    /**
     * 查看购物车
     * @return
     */
    @Override
    public List<ShoppingCart> showShoppingCart() {
        // TODO 获取不到登录用户id  BaseContext.getCurrentId()
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.selectByUserId(40L);
        return shoppingCartList;
    }

    /**
     * 清空购物车
     */
    @Override
    public void clean() {

        shoppingCartMapper.deleteByUserId(40L);

    }
}
